Adobe will probably have a hard time getting users over from Sublime, Github's Atom or JetBrains editors, just to name a few, if they don't commit a lot of resources into it.
brackets is a good editor with nice features and is easy to use. It has multi-caret editing, which is essential to me now. It can choke on larger files though and isn't as robust in doing search / replace as I've used before. I had one file that all my editors were choking on except ultraedit took care of it.
definitely for free, brackets is excellent and I can recommend it to people. But serious editors and programmers will find some sort of missing feature or flaw within a short time using it I bet. Still I encourage development on it.
Github repo: https://github.com/adobe/brackets/